An inappropriate choice could lead to a rapid deterioration of the original characteristics.

ACTION OF NATURAL, CHEMICAL, PHISICAL AND MECHANICAL AGENTS

The catalogue lists conditions of use in relation to the agents defined above. If the foresen use of a product involves contact with agents not included here, contact us in order to select the most suitable product.

PHISICAL -- MECHANICAL CHARACTERISTICS

HARDNESS

Unit of measurement SHORE A in compliance with standard ASTM D 2240 - 64 T. It is only valid if the measurement is made on a thickness of 4 mm. If measurements are made on thinner or thicker samples the figures vary and are invalid, particularly in the case of rubber with low hardness grade.

For sheets with ply inserts, the hardness figures are only indicative.

SPECIFIC WEIGHT

Unit of measurement gr/cm3 reppresenting the weight in kg of a sheets with a surface area of 1 square meter and a thickness of 1 mm. It therefore determines the volumetric yield of the product, with very important economic implications.

It indicates the percentage ratio between the length at the moment of breaking and the initial length of the rubber.

TEAR RESISTANCE

Unit of measurement Kg/cm in compliance with norm ASTM D 624 B.

Indicates the force per unit of length that tears or splits the rubber.

RESIDUAL DEFORMATION AFTER COMPRESSION

Unit of measurement % (percentage), in compliance with norm ASTM D 395 B. Indicates permanent residual deformation in relation to the original thickness of the sheets after a technical crushing test at specific temperature and for a given time.

ABRASION RESISTANCE

Unit of measurement mm3 ABRADED, in compliance with standard DIN 53516. Indicates the degree of resistance of the rubber to abrasion, in cubic millimetres of abraded material from the test sample.

TEMPERATURE RANGE

Unit of measurement °C (degrees centigrade). Indicates the minimum and maximum temperatures that must not be exceeded in the continuous use of the slabs.

BRITTLENESS LIMITS

Unit of measurement °C (degrees centigrade). Indicates the degree of brittleness of a sheets. Beyond this temperature the elastomer breaks very easily and looses all its elastic qualities.

GENERAL INFORMATION

SURFACE TEXTURE

The surface of the sheets can be smooth or impressed with ply.

The impression is achieved with special plies that produce an even imprint without visible irregularities.

SHEETS AND MAT ROLL FORMATS

The relevant lengths and widths of the rolls are indicated for each type of sheets and matting.

TOLERANCE

HARDNESS

The hardness figures given are valid within a tolerance of ± 5 SHORE A points.